Prices on menus do not include tax which is 6.5% for most of DW. The All Stars and WWOS are in Osceola County which had a 7% tax rate, but I read that it went up a half percent to 7.5% as of January 1.
Unless specifically stated, that is. Some of the dining experiences specifically state that they include all taxes and gratuities, but that's basically just CRT and the dinner shows, last time I checked.